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Xu X.,China Coal Information Institute | Liu W.,China Coal Information Institute | Qi J.,University of Chinese Academy of Sciences | Han J.,China Coal Information Institute | Wang J.,Beijing University of Chemical Technology
Ceramics International | Year: 2017

Different kinds of metal oxide nanorods (CeO2, ZrO2 and LaAlO3) grown on hierarchical macroporous γ-alumina monolith with excellent thermostability and mechanical strength are successfully synthesized by combining sol-gel method with boiled water-bath crystallization. Different kinds of metal oxide nanorods have different growth behavior. Monolayer stripe CeO2 nanorods with approximately equal length accumulated by nanoparticles covered mainly on the surface of the skeleton. Minor ZrO2 nanoparticles not only accumulated on the surface but also grew on hollow and conjunct part of the skeleton as well as the internal surface of the pore channels in a stagger and grid way. While the LaAlO3 crystal particles were grown mainly on the skeleton surface of alumina monolith but hardly any on the internal surface. In addition, the dipping time and temperature of metal ions have important effects on the nanoparticles morphology. The unique combination of excellent support and auxiliaries candidates can be used as promising functional materials in the field of heat/mass transfer, microchannel and separation especially in heterogeneous catalysis. © 2017 Elsevier Ltd and Techna Group S.r.l.


Grant
Agency: European Commission | Branch: FP7 | Program: CP | Phase: ENERGY.2010.5&6.2-1 | Award Amount: 2.45M | Year: 2011

Coal mining and utilisation results in release of significant amounts methane and represent an important threat to the fight against climate change. Coal Mine Methane drainage processes can be set up to recover methane from the emissions during coal production. Methane can also be extracted from virgin coal seams trough primary and enhanced coalbed methane recovery. The main objective of the proposed research project is to contribute to the global GHG emissions reduction objective by addressing the key challenges facing the industry and emerging economies which also are major coal mining counties worlwide. This objective canbe expanded upon as follows: - to achieve significant improvements in methane drainage efficiency and purity in coal mines in the emerging economies of China and India, where methane drainage is employed with relatively low yields of gas and purity. - to develop a novel and effective gas drainage techniques for the ultra-thick seam and gassy mining operations in Europe - to investigate the benefits of implementing horizontal wells for coalbed methane (CBM) and coupling horizontal wells with the injection of CO2 and/or CO2 enriched flue gas to enhance methane recovery and CO2 storage - to disseminate the know-how developed across the coal sector internationally


Zhao T.,Beijing Institute of Technology | Wang J.,Beijing Institute of Technology | Xu X.,China Coal Information Institute | Wang G.,Beijing Institute of Technology
China Petroleum Processing and Petrochemical Technology | Year: 2015

The hierarchically structured ZSM-5 composites (HZC) with trimodal pores (macropores/mesopores/micro-pore) were synthesized by transforming the skeleton of the macroporous aluminosilica gel into ZSM-5 pure phase crystals through steam-assisted conversion method. The monolithic aluminosilica gel was used not only as the silicon and aluminum sources, but also as a structural support. The synthesis parameters, such as the composition of the precursor solution, the Si/ Al feed ratios of the support gel, the time for impregnation of the support with the synthesis mixture and the structure-directing agents (SDAs) with different crystallization temperatures, were investigated. The textural properties of the resulting samples were characterized by means of the Fourier transform infrared (FT-IR) spectroscopy, X-ray powder diffractometry (XRD), scanning electron microscopy (SEM) and N2 adsorption-desorption isotherms. The experimental results indicated that the HZC could be manufactured with quaternary ammonium hydroxide as SDA without seeding and additional sources of silicon or aluminum, the Si/Al feed ratio of the support and pretreatment time had a significant effect on the morphology of the products using tetrapropyl ammonium hydroxide (TPAOH) as SDA. Furthermore, the textural properties varied from the macroporous aluminosilica gel when different SDAs at different crystallization temperatures were also discussed.


Sun X.,China University of Mining and Technology | Sun X.,China Coal Information Institute | Nie B.S.,China University of Mining and Technology | Huang S.C.,China Coal Information Institute | Hu S.T.,China University of Mining and Technology
Advanced Materials Research | Year: 2014

This paper introduces occurrence characteristics of coal bed methane in China, and analyses the influence of coal seam permeability on coal mine methane extraction. In addition, it presents the mechanism of increasing permeability by pressure relief. Lastly, the methane extraction technologies are discussed, and the applicable conditions of these technologies are analyzed. It is seen that choosing appropriate methane drainage technology, often in combination with several technologies including ground drilling, underground drilling, and pressure relief and permeability improving measures, is crucial for geological complex coal seam, especially low permeability soft coal seam. © (2014) Trans Tech Publications, Switzerland.


Liu W.-G.,China University of Mining and Technology | Liu W.-G.,China Coal Information Institute | Guo D.-Y.,China University of Mining and Technology | Xu X.,China Coal Information Institute
Meitan Xuebao/Journal of the China Coal Society | Year: 2012

Bimodal Al2O3 porous material with both mesopores and three-dimensional interconnected macropores in micrometer-scale was synthesized via sol-gel method. A kind of novel Pd/Al2O3 monolithic catalysts were prepared by impregnation using the as-synthesized Al2O3 porous material as the support. Influence of different additives of Ce, Zr, La and different load amount of the additives on methane combustion activity were investigated. The experimental results show that the new synthesized Pd/Al2O3 catalyst has good low temperature activity. Under the experimental conditions of 1%CH4 with reaction gas space velocity of 6000 h-1, the ignition temperature of Pd/Al2O3 is only 227°C. It is considered that the three-dimensional interconnected macropores of Al2O3 support can provide fast mass transfer channel; while the nanoscale mesopores in the skeleton can provide large surface area and unit volume, and thus help to increase the catalytic activity by improving the dispersion of the active component and use efficiency. Additives of Zr can reduce the ignition temperature of the catalyst; the influence of additive of Ce on the catalyst activity depends on the loaded amount.


Su S.,CSIRO | Han J.,China Coal Information Institute | Wu J.,China Coal Information Institute | Li H.,China Coal Information Institute | And 4 more authors.
Atmospheric Environment | Year: 2011

Large quantities (about 28 billion m3) of methane are released to the atmosphere every year from coal-mining activities around the world. This methane represents not only a significant greenhouse gas that is contributing to global temperature change, but is also a wasted energy resource. China, the largest coal producer in the world, is responsible for over 50% of the total global release of methane-containing ventilation air from coal mines. A mine site investigation methodology was developed for collecting reliable methane emission data from coal mines. Five main coal-mining areas in China were studied and specific data were collected from two mines in each of the five mining groups. Information such as coal and methane reserves, ventilation air released, methane concentration and methane release rates were collected. Future development plans were evaluated and used to estimate potential future emissions. It was determined that most of the methane generated in the five mining areas is currently released to the atmosphere. © 2011.


Tan B.,China University of Mining and Technology | Song Y.,China Coal Information Institute | Shi W.,China University of Mining and Technology
Proceedings - 2014 IEEE Workshop on Advanced Research and Technology in Industry Applications, WARTIA 2014 | Year: 2014

The current coal mine security situation grim, malignant accidents occur frequently, the main reason is serious illegal or irregular act, the manage problem of false lax in some places is relatively outstanding. In order to solve illegal violation of coal mine and management from carrying out the problem. This article first from the background of the Gu county in ShanXi coal mine, introduces in detail the application of coal mine safety supervision, by introducing the construction safety supervision of the problem, proposed the necessity of the coal mine production safety supervision and the specific questions that might encounter, according to the principle of safety supervision work is put forward to establish the system of coal mine safety production supervision formulate thought. The results show that the introduction of independent third party according to the relevant guidelines, policies, rules and regulations and technical standards to the coal mine production process implementation services, and to the behavior of the coal mining enterprises to form effective restriction mechanism, can make up for the government macroscopic supervision and the limitations of their own management and shortage. The establishment of the system to provide a reliable guarantee for coal mine safety production. © 2014 IEEE.


Nie B.,China University of Mining and Technology | Huang X.,China University of Mining and Technology | Sun X.,China Coal information Institute | Li A.,China University of Mining and Technology
Safety Science | Year: 2016

The research targets to obtain the extent of the physiological changes of the victims of accidents. During the research, the physiological indexes of the volunteers were first measured both before and after the experiment for which the coal mine accidents are simulated; next, the extent of the variations and the significant differences of the indexes are analyzed. The results indicate that the victims of the accident have experienced intense physiological and psychological changes. These significant physiological and psychological changes include: systolic blood pressure, mean pressure, pulse rate, pulse pressure, heart rate, R-R interval, R wave amplitude respiratory rate. The one that has gone through the most significant variation is the pulse pressure. However, only the systolic blood pressure and the heart rate have demonstrated significant change during the second trial. Practical Applications: The psychological changes of the victims are rather rapid and complex. The victims' abilities for carrying out proper judgments and actions that accord with the surrounding were weakened by their physiological state. It is of significance to quantitatively analyze physiological variation of the victims, to select the staffs through the personality assessment and to improve individual's psychological quality and the ability of emergency disposal by training in the simulated accident scenarios. © 2016 Elsevier Ltd.


Guo D.,China University of Mining and Technology | Li F.,China University of Mining and Technology | Liu W.,China Coal Information Institute
China Petroleum Processing and Petrochemical Technology | Year: 2013

Influence of ammonium salt treatment and alkali treatment of the coal based activated carbon (AC) and activated carbon fiber (ACF) adsorbents on methane adsorption capacity was studied via high-pressure adsorption experiment. Surface functional groups and pore structure of two types of adsorbents were characterized by the application of infrared absorption spectroscopy (IR) and low temperature liquid nitrogen adsorption method. The results show that both ammonium salt treatment and alkali treatment have obvious effect on changing BET, pore volume as well as pore size distribution of adsorbents; and methane adsorption capacity of the activated carbon fiber is the maximum after the ammonium salt treatment.


Mei G.,China Academy of Safety Science and Technology | Liu L.,China Coal Information Institute
Progress in Mine Safety Science and Engineering II - Proceedings of the 2nd International Symposium of Mine Safety Science and Engineering | Year: 2014

While probing into the investigation mechanism for the accidents occurring in American coalmines, the differences of the enforcement basis and mechanisms on the coalmine accidents between China and USA are compared and analyzed. Furthermore, the problems of China in the accident investigation mechanism are reviewed in a scientific, independent and systematic approach. Then, the author suggests the American advanced experiences and operations should be learnt, and subsequently comes up with the countermeasures for improving the investigation mechanism of China. © 2014 Taylor & Francis Group.

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